Black strips across roads

Evil_Kitten 27 September 2012 36

What are the temporary black strips across roads for?

There’s usually two of them parallel to each other and they’re attached to a box that’s off the road.

Are they just to monitor the amount of traffic?

Are they speed related in any way?


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36 Responses to Black strips across roads
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Henry82 Henry82 12:11 pm 08 Oct 12

They know the exact weight, tyre pressure and axle length of white holden commodores, then they automatically sms the police to alert them of a crime about to take place.

Monomyth Monomyth 11:33 am 08 Oct 12

“Are they speed related in any way?”

The cynic in me believes you were speeding, saw them, and are now dreading a ticket 🙂

Evil_Kitten Evil_Kitten 4:48 pm 01 Oct 12

I never said anything about being a renegade. You are a little bit strange.

What’s with all the black hatch, jam tin, etc comments people? Is it because of “old” comment? I’m no spring chicken myself so don’t get your panties in a knot ladies!

Woody Mann-Caruso Woody Mann-Caruso 9:22 am 01 Oct 12

5-10km over, like most normal people

Wow. You’re clearly as black-hearted and full of feline cunning as your account name suggests to be able to pull that off. What’s it like to be the coolest super villain of our time? It must be awesome being such a renegade.

More probably a grey import ricer with shiny mags

I’m gonna say a Golf. GTD, maybe an R. That, or a Suzuki Swift.

Deref Deref 8:25 am 01 Oct 12

Evil_Kitten said :

You buy your jam in tins?!

No, but I assume caterers and the like do.

I haven’t seen them around for ages on supermarket shelves though. I assume it’s because they were all bought up by 18 year-olds to replace the mufflers on their ricers.

Evil_Kitten Evil_Kitten 2:01 am 01 Oct 12

Deref said :

Woody Mann-Caruso said :

Hahaha no I always speed and my conscience feels no guilt about it

Hahaha I bet you drive a black hatch and wear enormous sunglasses and have nothing to prove at all

More probably a grey import ricer with shiny mags, a doof machine and a jam tin exhaust.

You buy your jam in tins?!

Evil_Kitten Evil_Kitten 1:59 am 01 Oct 12

bundah said :

Evil_Kitten said :

dpm said :

“Are they speed related in any way?”

Hahahaha! Someone got a guilty conscience?? 🙂

Hahaha no I always speed and my conscience feels no guilt about it 😛

What is your definition of speeding,5,10,15,20 km/h over the limit or there are those i see who exceed the limit anywhere from 50 to 100 km/h.

5-10km over, like most normal people who spend more time being aware of the traffic and conditions around them, rather than staring at the speedo in fear of going 1km over.

bundah bundah 9:31 am 29 Sep 12

Evil_Kitten said :

dpm said :

“Are they speed related in any way?”

Hahahaha! Someone got a guilty conscience?? 🙂

Hahaha no I always speed and my conscience feels no guilt about it 😛

What is your definition of speeding,5,10,15,20 km/h over the limit or there are those i see who exceed the limit anywhere from 50 to 100 km/h.

Deref Deref 7:40 am 29 Sep 12

Woody Mann-Caruso said :

Hahaha no I always speed and my conscience feels no guilt about it

Hahaha I bet you drive a black hatch and wear enormous sunglasses and have nothing to prove at all

More probably a grey import ricer with shiny mags, a doof machine and a jam tin exhaust.

Evil_Kitten Evil_Kitten 3:22 am 29 Sep 12

Woody Mann-Caruso said :

Hahaha no I always speed and my conscience feels no guilt about it

Hahaha I bet you drive a black hatch and wear enormous sunglasses and have nothing to prove at all

A black hatch? wtf? lol

2620watcher 2620watcher 10:10 pm 28 Sep 12

Surely they use the two strips to determine which way vehicles are traveling?

Calculating speed would be fraught with danger based on tyre pressures, tyre size etc all impacting the tyre footprint on the road and hence the time between hitting the two rubber hoses which appear to be no more than 1ft apart?

p1 p1 8:10 pm 28 Sep 12

Dougal said :

Ok – I just thought about that for a minute and realised it could work as a speed checker if the two tubes were close and the tubes were recording the front tyre/s hitting the first tube, then the front tyre/s hitting the second. No need to worry about chassis length or the rear tyres.

Then, since you know the speed of the vehicle, and the amount of time between the two (or more) axles hitting the tube, you can calculate the wheel base of the the vehicles using the road. I don’t actually know if they bother to do this, but the maths is simple.

troll-sniffer said :

I used to think that was the case until I had a closer look one day and discovered that one end of the tubes seems to be planted in the ground. So I asked a nearby Ranger and he confided that they are in fact nitrogen fertilisers for nearby trees. Since air contains 70% nitrogen, a pressurised injection of nitrogen laden gas (air) to the roots saves on fertiliser. If you look at just about any of these installations you’ll see that there is usually a tree nearby, often in less than perfect condition. Just be glad your driving habits are contributing to the nation’s trees bit by bit.

Best answer ever.

Woody Mann-Caruso Woody Mann-Caruso 7:00 pm 28 Sep 12

Hahaha no I always speed and my conscience feels no guilt about it

Hahaha I bet you drive a black hatch and wear enormous sunglasses and have nothing to prove at all

SnapperJack SnapperJack 4:12 pm 28 Sep 12

Evil_Kitten said :

Dougal said :

But seriously, has anyone ever received a speeding fine this way?

If Snapper is correct and it was only used until the early 1990’s then that would only be people willing admit they’re really really old.

Anyone? 😛

I received an Amphometer fine in Captain Cook Crescent in 1987. Going 75 in a 60 zone. I wrote to the head of traffic services (pre self-government) claiming a lack of signage and the fine was withdrawn. I don’t think they’d be so lenient nowadays.

switch switch 8:33 am 28 Sep 12

Evil_Kitten said :

I didn’t even think of this, but spot on! There are signs up saying the suburb is being resealed very soon!

Enjoy your CrapSealed roads. I wish they had left ours alone.

housebound housebound 7:07 am 28 Sep 12

Evil_Kitten said :

Dougal said :

But seriously, has anyone ever received a speeding fine this way?

If Snapper is correct and it was only used until the early 1990’s then that would only be people willing admit they’re really really old.

Anyone? 😛

Willing to admit to being “really really old” (driving by 1990), but never booked like this.

Evil_Kitten Evil_Kitten 3:59 am 28 Sep 12

Dougal said :

But seriously, has anyone ever received a speeding fine this way?

If Snapper is correct and it was only used until the early 1990’s then that would only be people willing admit they’re really really old.

Anyone? 😛

TallBoy TallBoy 11:55 pm 27 Sep 12

Dougal said :

Pardon my ignorance, but I don’t understand how could these tubes could record the speed of a vehicle if they can’t determine the chassis length? A motorbike, a ‘smart’ car, an average car, a bus – wildly different distances between the tyres.

I just always assumed that they were for counting purposes, and that perhaps tube two was a backup for tube one.

I used to wonder the same thing Dougal and the answer is very simple. They don’t need chassis length to calculate your speed. What they do need is two tubes placed a set distance apart, and the time it takes for your front wheel to pass between the two. Gives distance over time.

Evil_Kitten Evil_Kitten 11:41 pm 27 Sep 12

dks00k said :

A common use of these is to monitor traffic flow prior to re-sealing the road surface. This typically allows RTA / TAMS / Contractor etc to apply an appropriate amount of bitumen and aggregate for the traffic conditions.

Particularly with the warmer weather approaching its a fair bet if you have these in your street you will soon be able to drive by and flick stones up at oncoming cars and cyclists.

I didn’t even think of this, but spot on! There are signs up saying the suburb is being resealed very soon!

Dougal Dougal 11:27 pm 27 Sep 12

Ok – I just thought about that for a minute and realised it could work as a speed checker if the two tubes were close and the tubes were recording the front tyre/s hitting the first tube, then the front tyre/s hitting the second. No need to worry about chassis length or the rear tyres.

Nothing to see here… move along…

But seriously, has anyone ever received a speeding fine this way?

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